Go with a 1,800 rpm generator rather than a 3,600 rpm generator.
Pick one rated for prime use rather than emergency or backup.
Those can be run 24/7 until a maintenance interval such as an oil change is needed.
Some have run close to 40,000 hours before a rebuild. The number of zeros is correct.
Wow! Can you post any links?
In other news, for those interested, Horror Fraught is blowing out the last of their 3600 RPM 7200 watt generator heads for $250 ($100 shipping).
IF things went absolutely flawless, like 4 1/2 years +/- continuous less oil and filter maint. Not bad. 🌪🌀🌨⚡